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gimp/libgimp/gimphelpui.c

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimphelpui.c
* Copyright (C) 2000 Michael Natterer <mitch@gimp.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <gdk/gdkkeysyms.h>
#include <gtk/gtk.h>
#include "gimpdialog.h"
#include "gimphelpui.h"
/* external functions */
void gimp_help (gchar *help_data);
/* local function prototypes */
static void gimp_help_callback (GtkWidget *widget,
gpointer data);
static gint gimp_help_tips_query_idle_show_help (gpointer data);
static gint gimp_help_tips_query_widget_selected (GtkWidget *tips_query,
GtkWidget *widget,
const gchar *tip_text,
const gchar *tip_private,
GdkEventButton *event,
gpointer func_data);
static gint gimp_help_tips_query_idle_start (gpointer tips_query);
static void gimp_help_tips_query_start (GtkWidget *widget,
gpointer tips_query);
/* local variables */
static GtkTooltips * tool_tips = NULL;
static GtkWidget * tips_query = NULL;
/**********************/
/* public functions */
/**********************/
void
gimp_help_init (void)
{
tool_tips = gtk_tooltips_new ();
}
void
gimp_help_free (void)
{
gtk_object_destroy (GTK_OBJECT (tool_tips));
gtk_object_unref (GTK_OBJECT (tool_tips));
}
void
gimp_help_enable_tooltips (void)
{
gtk_tooltips_enable (tool_tips);
}
void
gimp_help_disable_tooltips (void)
{
gtk_tooltips_disable (tool_tips);
}
void
gimp_help_connect_help_accel (GtkWidget *widget,
GimpHelpFunc help_func,
gchar *help_data)
{
GtkAccelGroup *accel_group;
if (!help_func)
return;
/* for convenience we set the wm icon here because
* this function is called for almost all gimp windows
*/
if (GTK_IS_WINDOW (widget))
gimp_dialog_set_icon (GTK_WINDOW (widget));
/* set up the help signals and tips query widget */
if (!tips_query)
{
tips_query = gtk_tips_query_new ();
gtk_widget_set (tips_query,
"GtkTipsQuery::emit_always", TRUE,
NULL);
gtk_signal_connect (GTK_OBJECT (tips_query), "widget_selected",
GTK_SIGNAL_FUNC (gimp_help_tips_query_widget_selected),
NULL);
/* FIXME: EEEEEEEEEEEEEEEEEEEEK, this is very ugly and forbidden...
* does anyone know a way to do this tips query stuff without
* having to attach to some parent widget???
*/
tips_query->parent = widget;
gtk_widget_realize (tips_query);
}
if (! gtk_signal_lookup ("tips_query", GTK_OBJECT (widget)->klass->type))
{
gtk_object_class_user_signal_new (GTK_OBJECT (widget)->klass,
"tips_query",
GTK_RUN_LAST,
gtk_signal_default_marshaller,
GTK_TYPE_NONE,
0,
NULL);
gtk_object_class_user_signal_new (GTK_OBJECT (widget)->klass,
"help",
GTK_RUN_LAST,
gtk_signal_default_marshaller,
GTK_TYPE_NONE,
0,
NULL);
}
gimp_help_set_help_data (widget, NULL, help_data);
gtk_signal_connect (GTK_OBJECT (widget), "help",
GTK_SIGNAL_FUNC (gimp_help_callback),
(gpointer) help_func);
gtk_signal_connect (GTK_OBJECT (widget), "tips_query",
GTK_SIGNAL_FUNC (gimp_help_tips_query_start),
(gpointer) tips_query);
gtk_widget_add_events (widget, GDK_BUTTON_PRESS_MASK);
/* a new accelerator group for this widget */
accel_group = gtk_accel_group_new ();
/* FIXME: does not work for some reason...
gtk_widget_add_accelerator (widget, "help", accel_group,
GDK_F1, 0, GTK_ACCEL_LOCKED);
gtk_widget_add_accelerator (widget, "tips_query", accel_group,
GDK_F1, GDK_SHIFT_MASK, GTK_ACCEL_LOCKED);
*/
/* ...while using this internal stuff works */
gtk_accel_group_add (accel_group, GDK_F1, 0, 0,
GTK_OBJECT (widget), "help");
gtk_accel_group_add (accel_group, GDK_F1, GDK_SHIFT_MASK, 0,
GTK_OBJECT (widget), "tips_query");
gtk_accel_group_attach (accel_group, GTK_OBJECT (widget));
}
void
gimp_help_set_help_data (GtkWidget *widget,
const gchar *tooltip,
gchar *help_data)
{
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_WIDGET (widget));
if (tooltip)
gtk_tooltips_set_tip (tool_tips, widget, tooltip, help_data);
else if (help_data)
gtk_object_set_data (GTK_OBJECT (widget), "gimp_help_data", help_data);
}
void
gimp_context_help (void)
{
if (tips_query)
gimp_help_tips_query_start (NULL, tips_query);
}
/*********************/
/* local functions */
/*********************/
static void
gimp_help_callback (GtkWidget *widget,
gpointer data)
{
GimpHelpFunc help_function;
gchar *help_data;
help_function = (GimpHelpFunc) data;
help_data = (gchar *) gtk_object_get_data (GTK_OBJECT (widget),
"gimp_help_data");
if (help_function)
(* help_function) (help_data);
}
/* Do all the actual GtkTipsQuery calls in idle functions and check for
* some widget holding a grab before starting the query because strange
* things happen if (1) the help browser pops up while the query has
* grabbed the pointer or (2) the query grabs the pointer while some
* other part of the gimp has grabbed it (e.g. a tool, eek)
*/
static gint
gimp_help_tips_query_idle_show_help (gpointer data)
{
GtkWidget *event_widget;
GtkWidget *toplevel_widget;
GtkWidget *widget;
GtkTooltipsData *tooltips_data;
gchar *help_data = NULL;
event_widget = GTK_WIDGET (data);
toplevel_widget = gtk_widget_get_toplevel (event_widget);
/* search for help_data in this widget's parent containers */
for (widget = event_widget; widget; widget = widget->parent)
{
if ((tooltips_data = gtk_tooltips_data_get (widget)) &&
tooltips_data->tip_private)
{
help_data = tooltips_data->tip_private;
}
else
{
help_data = (gchar *) gtk_object_get_data (GTK_OBJECT (widget),
"gimp_help_data");
}
if (help_data || widget == toplevel_widget)
break;
}
if (! help_data)
return FALSE;
if (help_data[0] == '#')
{
gchar *help_index;
if (widget == toplevel_widget)
return FALSE;
help_index = help_data;
help_data = NULL;
for (widget = widget->parent; widget; widget = widget->parent)
{
if ((tooltips_data = gtk_tooltips_data_get (widget)) &&
tooltips_data->tip_private)
{
help_data = tooltips_data->tip_private;
}
else
{
help_data = (gchar *) gtk_object_get_data (GTK_OBJECT (widget),
"gimp_help_data");
}
if (help_data)
break;
}
if (help_data)
{
gchar *help_text;
help_text = g_strconcat (help_data, help_index, NULL);
gimp_help (help_text);
g_free (help_text);
}
}
else
{
gimp_help (help_data);
}
return FALSE;
}
static gint
gimp_help_tips_query_widget_selected (GtkWidget *tips_query,
GtkWidget *widget,
const gchar *tip_text,
const gchar *tip_private,
GdkEventButton *event,
gpointer func_data)
{
if (widget)
gtk_idle_add ((GtkFunction) gimp_help_tips_query_idle_show_help,
(gpointer) widget);
return TRUE;
}
static gint
gimp_help_tips_query_idle_start (gpointer tips_query)
{
if (! gtk_grab_get_current ())
gtk_tips_query_start_query (GTK_TIPS_QUERY (tips_query));
return FALSE;
}
static void
gimp_help_tips_query_start (GtkWidget *widget,
gpointer tips_query)
{
if (! GTK_TIPS_QUERY (tips_query)->in_query)
gtk_idle_add ((GtkFunction) gimp_help_tips_query_idle_start, tips_query);
}
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